How to delete folders from start menu:

Attrib -r -s -h C:\Users\%username%\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\(Folder Name)
Del /F /S /Q C:\Users\%username%\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\(Folder Name)
ERASE /F /S /Q C:\Users\%username%\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\(Folder Name)

EXAMPLE:
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Attrib -r -s -h C:\Users\%username%\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories
Del /F /S /Q C:\Users\%username%\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories
ERASE /F /S /Q C:\Users\%username%\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories